axis8758 Posted December 1, 2003 Share Posted December 1, 2003 Hello all, I'm new to this forum....Just picked up a 93' sc300 a few months ago. It's a rare 5 speed hardtop with cloth interior. The car has just over 163k miles and runs fine. The problem i'm having is sometimes after I start the car the RPM's will drop below normal idle and cause the car to start shaking and then die. It has never happened on a cold start just after I have driven it then parked and tried to start it again. The other thing I noticed is that when the RPM's start to drop and I press the gas pedal to rev the motor it has no response. thanks, Quote Link to comment Share on other sites More sharing options...
AWJ Posted December 1, 2003 Share Posted December 1, 2003 It could be a list of things. But since it only does it when you start the car after already driving - I want to say it is the fuel pump ecu, because that is one symptom. Quote Link to comment Share on other sites More sharing options...
SKperformance Posted December 2, 2003 Share Posted December 2, 2003 It is your idle control valve. Quote Link to comment Share on other sites More sharing options...
AWJ Posted December 2, 2003 Share Posted December 2, 2003 I'll bet it's not, but it is definitely worth checkin'. Just ribbin ya' sk - you wanna make a side bet though to make it a little interesting? Axis, if you know how to do these troubleshooting items give it a shot and let us know what you find. If you don't but have some mechanical ability, buy the factory service manuals and trouble shoot from there. They are worth their weight in gold. Otherwise take it to a good mechanic familiar with imports and tell him what you told us and have him check what we told you. The IAC is a fairly easy check for a guy like that. I want to win 10 bux from sk ;) Do yourself a favor and make sure your vacuum lines are all hooked up and not damaged, spark plugs are good, wires, rotor button and cap, clean connections, good air filter - and go from there. Quote Link to comment Share on other sites More sharing options...
SKperformance Posted December 2, 2003 Share Posted December 2, 2003 Quote Link to comment Share on other sites More sharing options...
axis8758 Posted December 2, 2003 Author Share Posted December 2, 2003 Thanks for the advise.........I'll be sure to let you guys know what I find. Quote Link to comment Share on other sites More sharing options...
ruse Posted June 21, 2004 Share Posted June 21, 2004 It is your idle control valve. skperfromance, I have read that these can be cleaned. Do you know of any guides, or have any tips as to how to do this? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
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